“The VA-API (Video Acceleration API) enables hardware accelerated video decode/encode at various entry-points (VLD, IDCT, Motion Compensation etc.) for the prevailing coding standards today (MPEG-2, MPEG-4 ASP/H.263, MPEG-4 AVC/H.264, and VC-1/WMV3). It provides an interface to fully expose the video decode capabilities in today’s GPUs.”
Note : Permet l’utilisation de tout les formats d’encodage par rapport à la version free. J’assume que la version non-free est gratuite pour un usage personnel.
You should be able to use any of the listed mirrors by adding a line to your /etc/apt/sources.list like this:
deb http://ftp.de.debian.org/debian bullseye main non-free
Replacing ftp.de.debian.org/debian with the mirror in question.